While we're not entirely sure of his intentions, Willis is back for The Expendables 2, along with fellow Expendables scene partner Arnold Schwarzenegger, with both actors having a more "substantial" role in the sequel, which has an even more expanded cast than the original. Strangely, details on the sequel have been scarce — a plot synopsis was revealed in May and involved the Expendables avenging the death of Mickey Rourke's character Tool, but was quickly dismissed. Fortunately, along with the teaser trailer comes a synopsis as well.

The Expendables are back and this time it's personal... Barney Ross (Stallone), Lee Christmas (Jason Statham), Yin Yang (Jet Li), Gunnar Jensen (Dolph Lundgren), Toll Road (Randy Couture) and Hale Caesar (Terry Crews) — with newest members Billy the Kid (Liam Hemsworth) and Maggie (Yu Nan) aboard — are reunited when Mr. Church (Willis) enlists the Expendables to take on a seemingly simple job. The task looks like an easy paycheck for Barney and his band of old-school mercenaries. But when things go wrong and one of their own is viciously killed, the Expendables are compelled to seek revenge in hostile territory where the odds are stacked against them. Hell-bent on payback, the crew cuts a swath of destruction through opposing forces, wreaking havoc and shutting down an unexpected threat in the nick of time — six pounds of weapons-grade plutonium; enough to change the balance of power in the world. But that's nothing compared to the justice they serve against the villainous adversary who savagely murdered their brother. That is done the Expendables way.

Place your bets on which of the Expendables team doesn't make it — Rourke has already admitted that he won't appear in the movie. As for who the villain is of the sequel, the synopsis doesn't mention it, but Jean-Claude Van Damme has already been revealed as the sequel's antagonist (with Scott Adkins as his right hand man), but there's little known about what role Chuck Norris will play, and there's no answer in the trailer. However, it's important to remember that this is only the teaser trailer, so we're sure that answer will be provided at some point. It's also worth noting that almost every cast member (except Li and Couture) is either holding or firing a gun (Van Damme brought a knife).

Another interesting tidbit from the trailer: Stallone is given sole credit for writing the script. Ken Kaufman (Space Cowboys) and David Agosto reportedly wrote the sequel, based on a storyline from Stallone. As far as the trailer is concerned, Stallone wrote the script. Simon West (Con Air) directed the sequel.